I MUST know how to change the framerate of an mpeg file. I can't find any programs that can help me. Can someone help me? Thanks.
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How can you change the framerate of an .mpeg file from 25 fps to 23.976 fps?
- Thread starter douggorilla
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I saw all that stuff, but I don't get any of it, including the relevant info. I'm really a novice at best with these types of programs. I wish someone could just tell me in laments terms how I could use hexedit to do what I want to do.
Turns out it's been too long since I did it myself, since I had forgotten a very important step: first you need to split the file into separate audio and video streams.
Get bbDemux, get info on it and set it to open in Rosetta (the only way I could get it to work). Open your MPEG with that and you should get separate *.m1v and *.m1a.
Open the *.m1v file in HexEdit and you should see right at the start of the file "00 00 01 B3". The following eight numbers are what's important. I suggest you back up your *.m1v file first.
The number that sets the video is the last of the second group of eight. This should (according to theory) be a 3 in the file; change it to a 1. Save.
If you want you can open the *.m1v file in Quicktime to check the framerate.
Now you have to combine the audio and video again, which will be a bit tricky since they will be of different lengths. You can try a straight muxing (daoble with MPEG2 Works demo, tools -> mux MPEG1. If the a/v sync is off and it bothers you, you will have to adjust the length of the audio to match the video, which is a whole other can of worms...
Get bbDemux, get info on it and set it to open in Rosetta (the only way I could get it to work). Open your MPEG with that and you should get separate *.m1v and *.m1a.
Open the *.m1v file in HexEdit and you should see right at the start of the file "00 00 01 B3". The following eight numbers are what's important. I suggest you back up your *.m1v file first.
The number that sets the video is the last of the second group of eight. This should (according to theory) be a 3 in the file; change it to a 1. Save.
If you want you can open the *.m1v file in Quicktime to check the framerate.
Now you have to combine the audio and video again, which will be a bit tricky since they will be of different lengths. You can try a straight muxing (daoble with MPEG2 Works demo, tools -> mux MPEG1. If the a/v sync is off and it bothers you, you will have to adjust the length of the audio to match the video, which is a whole other can of worms...
Rosetta is the PPC emulator on Intel-based Macs. If you have an Intel-based Mac, then you have Rosetta. If you have a PPC-based Mac, then you don't have it because you don't need it.
^I just tried that, and I don't see anything about Rosetta. Is this a Leopard-only thing? Because I still have Tiger.
It's not a Leopard thing... it's an Intel thing , if you're on an Intel machine you will see this in every application.. but if you are on a PPC (aka G3 , G4 , G5) Rosetta it's not there cause it's not neccesary